Feature design for HMM based Eastern Asian character recognition
US7974472B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2007 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Apr 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/287
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An exemplary method for online character recognition of East Asian characters includes acquiring time sequential, online ink data for a handwritten East Asian character, conditioning the ink data to produce conditioned ink data where the conditioned ink data includes information as to writing sequence of the handwritten East Asian character and extracting features from the conditioned ink data where the features include a tangent feature, a curvature feature, a local length feature, a connection point feature and an imaginary stroke feature. Such a method may determine neighborhoods for ink data and extract features for each neighborhood. An exemplary Hidden Markov Model based character recognition system may use various exemplary methods for training and character recognition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.